Long story short the lcd cracked in my climate control so i got a new one from the wrecker, my car is a 97 donor car was a 98. Both were coded 04140 iirc, regardless they were the same. When i turn my lights on now the back lighting gets brighter and with the lights off its really dim, dimming with the lights on is still controlled with the knob on the cluster. I know of the special menu in the hvac to get codes and stuff but isthere anything on adjusting the backlighting?